Dell Force10 E600i FTOS Version 8.4.1.5 Configuration Guide for ExaScale - Page 548
mac learning-limit dynamic, mac learning-limit station-move
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www.dell.com | support.dell.com To set a MAC learning limit on an interface: Task Specify the number of MAC addresses that the system can learn off a Layer 2 interface. Command Syntax mac learning-limit address_limit Command Mode INTERFACE Three options are available with the mac learning-limit command: dynamic, no-station-move, and station-move, Note: An SNMP trap is available for mac learning-limit station-move. No other SNMP traps are available for MAC Learning Limit, including limit violations. mac learning-limit dynamic After you enable a MAC learning limit, MAC addresses learned on the port and entered in the MAC address table are static by default. If you configure the MAC learning dynamic option, learned MAC addresses are stored in the dynamic region of the table and are subject to aging. Entries created before this option is set are not affected. On the C-Series and S-Series, the MAC address table is stored in the Layer 2 FIB region of CAM. The Layer 2 FIB region allocates space for static MAC address entries and dynamic MAC address entries. On the E-Series, the MAC address table is stored in the Layer 2 ACL region. All MAC address entries on the E-Series are dynamic. FTOS Behavior: If you do not configure the dynamic option, the C-Series and S-Series do not detect station moves in which a MAC address learned off of a MAC-limited port is learned on another port on same line card. Therefore, FTOS does not take any configured station-move violation action. When a MAC address is relearned on any other linecard (any line card except the one to which the original MAC-limited port belongs), the station-move is detected, and the system takes the configured the violation action. mac learning-limit station-move c s mac learning-limit station-move is available only on platforms: The station-move option, allows a MAC address already in the table to be learned off of another interface. For example, if you disconnect a network device from one interface and reconnect it to another interface, the MAC address is learned on the new interface. When the system detects this "station move," the system clears the entry learned on the original interface, and installs a new entry on the new interface. 548 | Layer 2
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